Overwhelming turtle 'plague'

Hundreds of turtles have been released by people into the tiny pond of South Putuo Temple in Xiamen, Fujian province, and the animals are so crammed together that they are climbing on each other for relief. The temple has had to put up a sign to stop people from releasing more turtles into the pond.

Where did people release the turtles into?

A. A river

B. A pond

C. A lake